DIN 7991 M20 x 40 Countersunk Socket Screw
In stock in 12 material, grade and finish combinations.
Dimensions at M20 x 40
mm · DIN 7991 · 1986-01 · withdrawn| Dimension | Nominal | Min | Max | ISO 10642 | |
|---|---|---|---|---|---|
| d | Thread size | M20 | – | – | M20 |
| P | Thread pitch | 2.5 | – | – | 2.5 |
| l | Length | 40 | – | – | 40 |
| s | Hex socket size | 12 | – | – | 12 |
| dk | Head diameter | 36 | – | – | 36.05 |
| k | Head height | 8.5 | – | – | 10.16 |
- ISO 10642
- Values in bold differ from DIN 7991.
- Length incl. head
- 40 mm · 39.5–40.5 mm to DIN 7991 product grade A
- Approx. weight
- ≈ 107.79 kg per 1 000 pieces · Bare steel, before coating and packing.9.3 pieces per kg
Holes for this thread
ISO 273 · ISO 2306Clearance hole · fine21 mm
Clearance hole · medium22 mm
Clearance hole · coarse24 mm
Tap drill17.5 mm
